Why do scientists use the same restriction enzyme to cut both human and bacterial dna?

Why are certain toads in the amphibian family call spadefoot toad?

Choose all that apply. What European goods were exchanged for African slaves?

Under what conditions might a conditioned response become extinct

Bacterial cells have a much higher rate of metabolism than animal cells. Under ideal conditions some bacteria double in size and divide every 20 min, whereas most animal cells under rapid growth conditions require 24 hours.

Increase in carbon dioxide will lead to?

Agglutinins are surface antigens on RBCs. contain abundant stained "granules." prevent blood clotting. are antibodies that will attack surface antigens on RBCs of a different blood type.

Which of the following best explains why humans need constant supplies of fresh water? a. Humans need a constant supply of water to provide them with essential vitamins. b. Humans need a constant supply of water to maintain proper hygiene. c.

Which one of the following would be a good tool to represent data in terms of percentage of a whole?

A. E. coli is able to use foods other than glucose in the absence of available glucose, because falling levels of glucose cause an increase of B) activator protein A) operator B) promotor C) structural gene D) CAMP

To what phylum and class do tapeworms belong